/*
silverPDF is sponsored by Aleyant Systems (http://www.aleyant.com)

silverPDF is based on PdfSharp (http://www.pdfsharp.net) and iTextSharp (http://itextsharp.sourceforge.net)

Developers: Ai_boy (aka Oleksii Okhrymenko)

Permission is hereby granted, free of charge, to any person
obtaining a copy of this software and associated documentation
files (the "Software"), to deal in the Software without
restriction, including without limitation the rights to use,
copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the
Software is furnished to do so, subject to the following
conditions:

The above information and this permission notice shall be
included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR SPONSORS
BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
OTHER DEALINGS IN THE SOFTWARE.

*/
#region PDFsharp - A .NET library for processing PDF
//
// Authors:
//   Stefan Lange (mailto:Stefan.Lange@pdfsharp.com)
//
// Copyright (c) 2005-2008 empira Software GmbH, Cologne (Germany)
//
// http://www.pdfsharp.com
// http://sourceforge.net/projects/pdfsharp
//
// Permission is hereby granted, free of charge, to any person obtaining a
// copy of this software and associated documentation files (the "Software"),
// to deal in the Software without restriction, including without limitation
// the rights to use, copy, modify, merge, publish, distribute, sublicense,
// and/or sell copies of the Software, and to permit persons to whom the
// Software is furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included
// in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
// THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER 
// DEALINGS IN THE SOFTWARE.
#endregion

using System;
using System.Diagnostics;
using System.Collections;
using System.Text;
using System.IO;
#if GDI
using System.Drawing;
using System.Drawing.Imaging;
#endif
#if WPF
using System.Windows.Media;
#endif
using PdfSharp.Drawing;
using PdfSharp.Fonts.TrueType;
using PdfSharp.Internal;
using PdfSharp.Pdf.Internal;

namespace PdfSharp.Pdf.Advanced
{
  /// <summary>
  /// Represents a base class for dictionaries with a content stream.
  /// Implement IContentStream for use with a conent writer.
  /// </summary>
  public abstract class PdfDictionaryWithContentStream : PdfDictionary, IContentStream
  {
    /// <summary>
    /// Initializes a new instance of the <see cref="PdfDictionaryWithContentStream"/> class.
    /// </summary>
    public PdfDictionaryWithContentStream()
    { }

    /// <summary>
    /// Initializes a new instance of the <see cref="PdfDictionaryWithContentStream"/> class.
    /// </summary>
    /// <param name="document">The document.</param>
    public PdfDictionaryWithContentStream(PdfDocument document)
      : base(document)
    { }

    /// <summary>
    /// Initializes a new instance from an existing dictionary. Used for object type transformation.
    /// </summary>
    protected PdfDictionaryWithContentStream(PdfDictionary dict)
      : base(dict)
    { }

    /// <summary>
    /// Gets the resources dictionary of this dictionary. If no such dictionary exists, it is created.
    /// </summary>
    internal PdfResources Resources
    {
      get
      {
        if (this.resources == null)
          this.resources = (PdfResources)Elements.GetValue(Keys.Resources, VCF.Create);
        return this.resources;
      }
    }
    PdfResources resources;

    /// <summary>
    /// Implements the interface because the primary function is internal.
    /// </summary>
    PdfResources IContentStream.Resources
    {
      get { return Resources; }
    }

    internal string GetFontName(XFont font, out PdfFont pdfFont)
    {
      pdfFont = this.document.FontTable.GetFont(font);
      Debug.Assert(pdfFont != null);
      string name = Resources.AddFont(pdfFont);
      return name;
    }

    string IContentStream.GetFontName(XFont font, out PdfFont pdfFont)
    {
      return GetFontName(font, out pdfFont);
    }

    internal string GetFontName(string idName, byte[] fontData, out PdfFont pdfFont)
    {
      pdfFont = this.document.FontTable.GetFont(idName, fontData);
      Debug.Assert(pdfFont != null);
      string name = Resources.AddFont(pdfFont);
      return name;
    }

    string IContentStream.GetFontName(string idName, byte[] fontData, out PdfFont pdfFont)
    {
      return GetFontName(idName, fontData, out pdfFont);
    }

    /// <summary>
    /// Gets the resource name of the specified image within this dictionary.
    /// </summary>
    internal string GetImageName(XImage image)
    {
      PdfImage pdfImage = this.document.ImageTable.GetImage(image);
      Debug.Assert(pdfImage != null);
      string name = Resources.AddImage(pdfImage);
      return name;
    }

    /// <summary>
    /// Implements the interface because the primary function is internal.
    /// </summary>
    string IContentStream.GetImageName(XImage image)
    {
      throw new NotImplementedException();
    }

    /// <summary>
    /// Gets the resource name of the specified form within this dictionary.
    /// </summary>
    internal string GetFormName(XForm form)
    {
      PdfFormXObject pdfForm = this.document.FormTable.GetForm(form);
      Debug.Assert(pdfForm != null);
      string name = Resources.AddForm(pdfForm);
      return name;
    }

    /// <summary>
    /// Implements the interface because the primary function is internal.
    /// </summary>
    string IContentStream.GetFormName(XForm form)
    {
      throw new NotImplementedException();
    }

    /// <summary>
    /// Predefined keys of this dictionary.
    /// </summary>
    public class Keys : PdfDictionary.PdfStream.Keys
    {
      /// <summary>
      /// (Optional but strongly recommended; PDF 1.2) A dictionary specifying any
      /// resources (such as fonts and images) required by the form XObject.
      /// </summary>
      [KeyInfo(KeyType.Dictionary | KeyType.Optional, typeof(PdfResources))]
      public const string Resources = "/Resources";
    }
  }
}
